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Displaying 51 - 75 of 196

Experimental Investigation of Firebrand Accumulation Zones in Front of Obstacles

December 1, 2017
Author(s)
Samuel L. Manzello, Sayaka Suzuki
It is well accepted that as structures are exposed to wind, stagnation planes are produced around structures. Past work by the authors demonstrated for the first-time that wind-driven firebrand showers may accumulate in these stagnation planes. While those

Experiments to Quantify Firebrand Production from Roofing Assembly Combustion

November 12, 2017
Author(s)
Samuel Manzello, Sayaka Suzuki, Tomohiro Naruse
Large outdoor fires present a risk to the built environment. One example often in the international media reports are wildfires that spread into communities, referred to as Wildland-Urban Interface (WUI) fires. Another example are large urban fires

Investigation on Firebrand Generation from Reduced-scale Mock-ups

November 12, 2017
Author(s)
Samuel Manzello, Sayaka Suzuki
Firebrands generated from structures are known to be a source of rapid flame spread within communities in large outdoor fires, such as wildland-urban (WUI) fires, and urban fires. It is important to better understand firebrand generation mechanism. To this

Summary of Workshop Large Outdoor Fires and the Built Environment

July 13, 2017
Author(s)
Samuel L. Manzello, Raphaele Blanchi, Michael Gollner, Sara McAllister, Eulalia Planas, Guillermo Rein, Pedro Reszka, Sayaka Suzuki
Large outdoor fires present risk to the built environment. In this workshop, presentations highlighted large outdoor fires throughout the world, and explored synergies between these fires. Specifically, each presentation provided an overview of the large

Ignition of Mulch by Firebrands in Wildland/Urban Interface (WUI) Fires

February 19, 2017
Author(s)
Samuel Manzello, John R. Shields, Thomas Cleary, Jiann C. Yang
Firebrands or embers are produced as trees and structures burn in wildland/urban interface (WUI) fires. Hot firebrands ultimately come to rest and may ignite fuels far removed from the fire, resulting in fire spread. It is believed that firebrand showers

Microgravity Superagglomerates Produced by Silane and Acetylene

February 19, 2017
Author(s)
Matthew Bundy, George Mulholland, Samuel Manzello, Jiann C. Yang, J H. Scott
A study of acetylene and silane diffusion flames was performed in normal gravity (1-g) and microgravity ([mu]-g) to determine the evolution of soot and silica agglomerates. The objective of this study was to understand the process of gas phase

Numerical Modeling of Fire Spread Through Individual Trees and Shrubs

February 19, 2017
Author(s)
William E. Mell, Samuel Manzello, Alexander Maranghides
Fire spread through suspended vegetation, such as tree crowns, is a basic component of wildland fires. Most models of fire spread do not resolve the burning of individual trees. Instead, fire spread through a forest canopy, representing a collection tree

Real Fire Performance of Partition Assemblies: Insulated and Non-Insulated Assemblies

February 19, 2017
Author(s)
Samuel Manzello, Richard Gann, S R. Kukuck, Kuldeep Prasad, Walter W. Jones
Two gypsum wall assemblies were exposed to intense real-scale compartment fires, from the time of ignition to beyond flashover. The construction of each assembly (2.44 m by 2.44 m) was identical, with the exception that one of the wall assemblies was

The Effects of Nanostructure on the Stability of Nanocomposite Building Materials

February 19, 2017
Author(s)
Marc R. Nyden, Samuel Manzello, Richard H. Harris Jr.
Thermoplastics and composites made from hydrocarbon polymers can improve the affordability, strength-to-weight ratio, and durability of manufactured products. Unfortunately, the use of these materials in buildings and vehicles is limited because of their

Wildland-Urban Interface Fires: Overview and Research Needs

February 19, 2017
Author(s)
William E. Mell, Samuel Manzello, Alexander Maranghides, Ronald G. Rehm
Wildfires that spread into wildland-urban interface (WUI) communities present a significant challenge on a number of fronts. In the United States the WUI accounts for a significant portion of wildfire suppression and risk mitigation costs. Research on fire

Generating Wind-Driven Firebrand Showers Characteristic of Burning Structures

February 1, 2017
Author(s)
Samuel L. Manzello, Sayaka Suzuki
Firebrands are a significant source leading to structures ignited and lost in large outdoor fires, such as Wildland–Urban Interface (WUI) fires, a large international problem, and urban fires, common in Japan. Sadly, hardly any information is available

Investigating Firebrand Accumulation over Various Scales

November 22, 2016
Author(s)
Samuel Manzello, Sayaka Suzuki
As structures are exposed to wind, stagnation planes are produced around structures. Using full-scale experiments, the authors demonstrated that firebrands may accumulate in these stagnation planes. In a subsequent full-scale study performed by the authors